H. SalahEldeen, und M. Nelson. Proceedings of the 22Nd International Conference on World Wide Web, Seite 1075--1082. Republic and Canton of Geneva, Switzerland, International World Wide Web Conferences Steering Committee, (2013)
S. Nunes, C. Ribeiro, und G. David. Proceedings of the 9th Annual ACM International Workshop on Web Information and Data Management, Seite 129--136. New York, NY, USA, ACM, (2007)